Cervical collar with cable reel adjustment system

ABSTRACT

A cervical collar having a vertically adjustable chin support, the collar including a chin support adjustably connected to a collar body, a cable reel for adjusting the length of a cable cable, a cable stop connecting between the collar body and the chin support and slidingly positionable along a slot on the collar body and a pulley located on the collar body adjacent to the elongate slot. Adjustment of the length of the cable adjusts the position of the cable stop along the slot and adjusts the vertical position of the chin support relative to the collar body.

FIELD

This disclosure relates to the field of size adjustable cervical collars. More particularly, the disclosure relates to cervical collars that enable improved adjustment of the height of the chin support.

BACKGROUND

Cervical collars are used to maintain the spine of a patient in a desired orientation by immobilizing the neck of the patient and supporting the chin at a desired, generally level or neutral position. The position of the chin is maintained by locating a chin support to contact and support the underside of the chin at a desired angle.

The expense of cervical collars has resulted in various forms of adjustable collars that enable a single collar model to be used for a variety of patient sizes. However, a desire for improvement in the construction of adjustable collars remains.

SUMMARY

The disclosure relates to a cervical collar having a vertically adjustable chin support. In one aspect, the collar includes a chin support adjustably connected to a collar body, a cable reel for adjusting the length of a cable trained around a pulley located on the collar body adjacent to the elongate slot and having a terminal end connected to a cable stop connecting between the collar body and the chin support and slidingly positionable along a slot on the collar body. The length of the cable adjusts the position of the cable stop along the slot and adjusts the vertical position of the chin support relative to the collar body

In another aspect, the collar includes a chin support adjustably connected to a collar body configured to be positioned adjacent a neck of a patient and defining an elongate slot, a cable having a proximal portion connected to a cable reel located on the collar body for selectively adjusting the length of the cable, and a cable tensioning system located on the collar body.

The cable tensioning system including a cable stop connecting between the collar body and the chin support and slidingly positionable along the slot on the collar body and a pulley located on the collar body adjacent to the elongate slot. A distal portion of the cable is connected to the cable stop and the cable is trained about the pulley so that the direction of the cable is changed between the cable stop and the cable reel. Adjustment of the length of the cable adjusts the position of the cable stop along the slot and adjusts the vertical position of the chin support relative to the collar body.

In another aspect, a cervical collar having a vertically adjustable chin support is provided, with the cervical collar having a rear collar portion and a front collar assembly.

The front assembly includes a chin support positionable at the front of a user with the chin of the user resting in the chin support, and the rear collar portion is positionable at the back of the user, with the front collar assembly and the rear collar adjustably secured together to fit the neck of the user to restrain movement of the neck.

The front assembly also includes a main collar body connected to the chin support and an adjustable collar body connected to the main collar body, the adjustable collar body including an elongate slot defined thereon, a cable having a proximal portion connected to a cable reel located on the adjustable collar body for selectively adjusting the length of the cable, and a cable tensioning system located on the adjustable collar body.

The cable tensioning system includes a cable stop extending into and slidingly positionable along the slot and connected to the main collar body, and a pulley located on the collar body adjacent to the elongate slot. A distal portion of the cable is connected to the cable stop and the cable is trained about the pulley so that the direction of the cable is changed between the cable stop and the cable reel, and adjustment of the length of the cable adjusts the position of the cable stop along the slot and adjusts the vertical position of the chin support relative to the collar body.

In another aspect, the disclosure relates to cervical collar having a vertically adjustable chin support, the collar including: a chin support having: (a) a first side of the chin support adjustably connected to a first collar body configured to be positioned adjacent a first neck portion of a patient and defining a first elongate slot, a first cable having a proximal portion connected to a cable reel located on the collar body for selectively adjusting the length of the first cable, and a first cable tensioning system located on the first collar body, and (b) a second side of the chin support adjustably connected to a second collar body configured to be positioned adjacent a second neck portion of a patient and defining a second elongate slot, a second cable having a proximal portion connected to the cable reel for selectively adjusting the length of the second cable, and a second cable tensioning system located on the second collar body.

The first and second cable tensioning systems each include a cable stop connecting between the collar body thereof and the chin support and slidingly positionable along the slot on the collar body thereof, a spring positioned to bear against the cable stop, and a pulley located adjacent to the elongate slot thereof. A distal portion of the cable is connected to the cable stop and the cable is trained about the pulley so that the direction of the cable is changed between the cable stop and the and the cable reel, and adjustment of the length of the cable adjusts the position of the cable stop along the slot and adjusts the vertical position of the chin support relative to the collar body.

In yet a further aspect, the collar includes a chin support adjustably connected to a main collar body, and a pair of adjustable body portions pivotally connected to one another and configured to be positioned adjacent a neck of a patient and each defining an elongate vertical slot. The collar also includes a pair of cables, each having a proximal portion connected to a cable reel located on one of the adjustable body portions for selectively adjusting the length of the cables. A cable tensioning system is located on each of the adjustable body portions, each cable tensioning system including a cable stop connecting between the adjustable body portion and the main collar body and slidingly positionable along the elongate vertical slot on the adjustable body portion and a pulley located on the adjustable body portion adjacent to the elongate slot.

A distal portion of each cable is connected to the cable stop and the cable is trained about the pulley so that the direction of the cable is changed between the cable stop and the and the cable reel, and adjustment of the length of the cable adjusts the position of the cable stop along the elongate vertical slot and adjusts the vertical position of the chin support relative to the collar body.

In a yet further aspect of the disclosure, there is provided a cervical collar having a vertically adjustable chin support, the collar including a chin support and a pair of body portions pivotally connected to one another and configured to be positioned adjacent a neck of a patient. When the chin support is vertically adjusted relative to the body portions an angle defined between the chin support and the body portions remains substantially constant.

In a still further aspect, the disclosure relates to an adjustable body support, including a support adjustably connected to a body having an elongate slot, a cable reel for adjusting the length of a cable trained around a pulley located on the body adjacent to the elongate slot and having a terminal end connected to a cable stop connecting between the body and the support and slidingly positionable along the elongate slot on the body. The length of the cable adjusts the position of the cable stop along the elongate slot and adjusts the position of the support relative to the body.

The body support may be configured to adjustably support the chin of a user, or other anatomical portions of a patient.

BRIEF DESCRIPTION OF THE DRAWINGS

Further advantages of the disclosure are apparent by reference to the detailed description when considered in conjunction with the figures, which are not to scale so as to more clearly show the details, wherein like reference numbers indicate like elements throughout the several views, and wherein:

FIG. 1A is a front plan view of a front assembly for a cervical collar according to the disclosure adjusted to locate a chin support thereof to a first position; and FIG. 1B shows the front assembly of FIG. 1A adjusted to locate the chin support to a second and higher position.

FIG. 2 shows a back assembly of a cervical collar according to the disclosure.

FIG. 3 shows a front exploded perspective view of the front assembly of FIG. 1A, and

FIG. 4 is a rear exploded perspective view thereof.

FIG. 5 is a perspective view of a cable reel component of the front assembly of FIGS. 3 and 4, and FIG. 6 is an exploded view thereof.

FIG. 7 is a detailed front view showing components for maintaining cable tension; and

FIG. 8 is an exploded view thereof.

FIG. 9A shows positioning of the cable tension components when the chin support is at the low position of FIG. 1A; and FIG. 9B shows positioning of the cable tension components when the chin support is at the high position of FIG. 1B.

FIG. 10 shows a cable stop component of the cervical collar according to the disclosure.

FIG. 11 is a rear assembled view of the front assembly of FIG. 1A.

FIGS. 12A and 12B illustrate vertical adjustment of the chin support in a manner such that the orientation of the chin support remains substantially constant in all vertical positions of the chin support.

DETAILED DESCRIPTION

With reference to the drawings, the disclosure relates to an adjustable body support. The body support may be configured to adjustably support the chin of a user, or other anatomical portions of a patient.

In a preferred embodiment, the body support is a cervical collar 10 configured to enable adjustment of the height of a chin support 12 of the collar 10. The collar 10 also includes an adjustable front assembly having a front main body 14, front adjustable body portions 16 a and 16 b, cable tensioning systems 18 a and 18 b, and a cable reel 20. The front assembly may also include a sternal pad 22. The collar 10 also includes a rear assembly 24 having an occipital support 26 and a posterior support 28.

The cervical collar 10 is positioned about the neck of a user with the front assembly 14 situated at the front of the user with the chin of the user resting in the chin support 12, and the rear assembly 24 at the back of the user. The front assembly 14 and the rear assembly 24 are adjustably secured together as by straps to comfortably but snugly fit the neck of the user to restrain movement of the neck. The front assembly 14 is adjusted to situate the chin support 12 to maintain the chin of the user at a desired orientation, typically level.

The chin support 12 is of one-piece molded plastic construction, such as low density polyethylene) and is characterized as having a central located u-shaped portion 12 a, with adjacent side wings 12 b and 12 c on either side of the u-shaped portion 12 a. The u-shaped portion 12 a is suitably shaped to receive the chin of a user for supporting the chin and may include padding or the like for additional comfort of the user if desired. The chin support 12 is mounted to front main body 14 as by plastic rivets.

The front main body 14 is of one-piece molded plastic construction and is characterized as having a central connector 14 a bridging between adjacent side wings 14 b and 14 c. The connector 14 a spans between upper portions of the side wings 14 b and 14 c to define a cut-out for providing clearance for a tracheal tube of the like. The wings 14 b and 14 c include elongate, and preferably curved, slots 30 a and 30 b, respectively. The slots 30 a and 30 b receive fasteners F or the like inserted through aligned apertures 31 a and 31 b, respectively, of the adjustable body portions 16 a and 16 b. The fasteners F are preferably plastic, but may be other materials suitable for use in a cervical collar. The chin support 12 and the main body 14 may be provided as a unitary piece; however, having them as separate portions enables better conformity to the anatomy of the patient. Also, the adjustable body portions 16 a and 16 b may be provided as a single body portion, but, are preferably provided as two pieces that pivotally connect as described herein for improved conformity to the patient throughout the range of the height adjustment of the chin support 12.

The adjustable body portion 16 a is of one-piece molded plastic construction and is configured to overlie about one-half of the sterna or upper chest region of the patient. The adjustable body portion 16 b is substantially a mirror image of the body portion 16 b for overlying the other about one-half of the sterna or upper chest region of the patient. The body portions 16 a and 16 b overlap at their lowermost portions and pivotally attach to one another as by a rivet, fastener, or the like extending through aligned apertures 37 a and 37 b thereof. The body portion 16 a includes a slot 33 a adjacent a distal or raised end thereof, and the body portion 16 b includes a slot 33 b adjacent a distal or raised end thereof. The sternal pad 22 includes an aperture 22 a that is aligned with the apertures 37 a and 37 b, so that the fastener used to pivotally attach the body portions 16 a and 16 b also attaches the sterna pad 22. The slots 33 a and 33 b align with apertures 35 a and 35 b located on the side wings 14 b and 14 c of the main body 14, respectively, and receive fasteners or the like, such as the fasteners F.

The cable tensioning system 18 a is located on the exterior of the body portion 16 a and includes a cable guide 32, a pulley 34, a spring 36 located within a spring housing 38, and a cable stop 40. The pulley 34 may be a roller pulley or a simple knob or projection for changing the direction of the cable trained over it. Thus, the term “pulley” will be understood to mean a structure that changes the direction of a cable trained over it.

The spring 36 is a compression spring that gets shorter as a load is applied to it, as explained more fully below. The spring housing 38 is an enclosure for enclosing the spring so that as a load is applied to the distal or lower end of the spring, the proximal or upper end of the spring bears against spring housing 38. The spring housing 38 overlies a slot 42 a defined on the adjustable body portion 16 a (FIG. 4) and located to align with a corresponding aperture of the body portion 14. The cable stop 40 is a plastic knob or the like that is located adjacent to and in engagement with the distal end of the spring 36 within the spring housing 38.

The cable stop 40 includes a projection 44 (FIG. 10) that extends through the slot 42 a and a corresponding aperture 45 a of the body portion 14 and is captured by a plastic washer or the like to connect the main body portion 14 and the adjustable body portion 16 a, with the main body portion 14 being able to move relative to the adjustable body portion 16 a commensurate with the slot 42 a. A cylindrical shaft 46 perpendicular to the projection 44 may be provided for receiving the end of the spring 36. In this regard, the cable 52 a may be passed through the spring 36, through the shaft 46, and out of an aperture 48 of the cable stop 40, and secured as by a fastener or knot or the like to secure the cable 52 a to the cable stop 40.

The cable tensioning system 18 b is substantially identical to the cable tensioning system 18 a and is located on the exterior of the body portion 16 b, with the spring housing 38 thereof overlying a slot 42 b defined the adjustable body portion 16 b, with the projection 44 of the cable stop 40 extending into an aperture 45 b of the body portion 14.

The cable reel 20 is a rotating spool that winds or unwinds cable and, preferably includes a toothed housing 50 mounted onto the front body portion 16 a. The housing 50 is configured for receiving a pair of cables 52 a and 52 b, each having a proximal end rotationally linked to a spool 54 contained within the housing 50. The opposite distal ends of the cables 52 a and 52 b are connected to the cable stop 40 of the cable tensioning systems 18 a and 18 b, respectively. A knob 56 having a spring-loaded assembly 58 cooperates with the housing 50 and the spool 54 for manually winding the cables 52 a and 52 b around the spool 54. The knob 54 includes a pawl integrally formed on an inner surface of the knob 54 to selectively engage the teeth of the housing 50 to provide a ratchet feature for winding the spool 54 when the knob 56 is turned in one direction to tension the cables 52 a and 52 b. The spring-loaded assembly 58 is depressed to release the teeth of the knob 54 from engagement with the housing 50 to allow the spool to be released to untension the cables 52 a and 52 b. Suitable devices to use for the cable reel 20 are cable reel devices available under the name BOA from Boa Technology, Inc. of Denver, Colo., and described in U.S. Pat. Nos. 7,954,204 and 7,992,261, incorporated by reference in their entireties.

By utilizing the cable reel 20 to adjust the lengths of the cables 52 a and 52 b, the cable tensioning systems 18 a and 18 b are utilized to vertically adjust the position of the chin support 12 relative to the body portions 16 a and 16 b which remain substantially statically positioned around the neck of the user. In this regard, and with reference to FIG. 9A, it will be seen that the cable 52 a is of a length as provided by manipulation of the reel 20, so that the cable stop 40 of the tensioning system 18 a is at a lowermost position of the housing 38. This position of the cable stop 40 corresponds to the chin support 12 being at its lowermost vertical height. Next, with reference to FIG. 9B, it will be seen that the cable 52 a has been retracted by use of the reel 20 to position the cable stop 40 at an uppermost position of the housing 38. This position of the cable stop 40 corresponds to the chin support 12 being at its uppermost vertical height. As will be appreciated, by adjusting the lengths of the cables 52 a and 52 b using the reel 20, the chin support 12 may be positioned at any vertical height within the range of the uppermost and lowermost positions of the cable stop 40. Also, as the reel 20 uniformly winds and unwinds the cables 52 a and 52 b, the tensioning systems 18 a and 18 b are substantially uniform in their adjustment so that the chin support remains substantially level. However, if it were desired to have an adjustment system that enabled canted or non-level adjustment, the same may be accomplished by adjusting the positions of the tensioning systems 18 a and 18 b relative to one another or otherwise enabling different cable length adjustments.

Provision of the compression spring 36 for the tensioning systems 18 a and 18 b is advantageous so as to maintain a downward bias on the cable stops 40 to minimize free play of the cable stops 40. In this regard, it will be observed that in FIG. 9B, the spring 36 is substantially extended and bearing against the stop 40, and in FIG. 9B the spring 36 is substantially compressed and bearing against the cable stop 40. It will be appreciated that other bias members may be used to maintain a downward bias on the cables tops 40. For example, a rubber band 60 or the like may be attached to the cable stop 40 and to a fixed point below the stop 40, such as anchor 62, to maintain a downward bias on the cable stop 40.

The adjustable front assembly is assembled so that the front adjustable body portions 16 a and 16 b overlap at their lowermost portions and attach to one another as by plastic rivets extending through aligned apertures thereof, with the cable reel 20 mounted to the body portion 16 a. The adjustable body portions 16 a and 16 b do not move, but are adjusted by use of the cable tensioning systems 18 a and 18 b to adjust the vertical position of the front assembly 14 relative to the adjustable body portions 16 a and 16 b to desirably situate the chin support 12 mounted to the front assembly.

The front assembly 14 is movably mounted to the adjustable body portions 16 a and 16 b by the projections 44 of the cable stops 40 that extend through the slots 42 a and 42 b, respectively, and the corresponding apertures 45 a and 45 b of the body portion 14 and captured by plastic washers or the like to connect the main body portion 14 and the adjustable body portions 16 a and 16 b. Thus, by utilizing the cables 52 a and 52 b to move the cable stops 40 vertically within the slots 42 a and 42 b by operation of the cable reel 20, the main body portion 14 is vertically adjusted relative to the adjustable body portions 16 a and 16 b commensurate with the limits of the slots 42 a and 42 b.

In addition, as other portions of the main body portion 14 and the adjustable body portions 16 a and 16 b are attached to one another as by fasteners, the slots 30 a and 30 b of the adjustable body portions 16 a and 16 b accommodate additional relative positioning commensurate with the vertical adjustment resulting from adjustment of the positions of the cable stops 40 of the cable tensioning systems 18 a and 18 b using the cable reel 20. Also, the provision of the adjustable body portions 16 a and 16 b as separate pieces and the ability of the adjustable body portions 16 b and 16 b to pivot relative to one another enables improved conformity of the collar 10.

The chin support 12 is fixedly mounted to the main body portion 14 as by mutually aligned apertures and plastic fasteners. Thus, as the main body portion 14 is vertically adjusted using the tensioning systems 18 a and 18 b, the chin support 12 is likewise vertically adjusted relative to the relative to the positions of the body portions 16 a and 16 b. For example, with reference to FIGS. 1A and 1B, it will be seen that the chin support 12 is vertically higher in FIG. 1A than in FIG. 1B, it being understood that the adjustment of the position of the chin support 12 is accomplished by use of the cable tensioning systems 18 a and 18 b as previously described.

The structure of the collar 10 also advantageously enables vertical adjustment of the chin support 12 in a manner such that the orientation of the chin support 12 remains substantially constant in all vertical positions of the chin support 12. For example, with reference to FIGS. 12A and 12B, there is shown the collar 10 with the chin support 12 positioned (from right to left) in the lowest, middle, and highest positions. However, despite the vertical height of the chin support 12, an angle A between the chin support 12 and the adjustable body portions 16 a and 16 b remains substantially constant, preferably about 90 degrees. Also, the structure of the collar 10 also advantageously enables the sternal pad 22 to remain in substantial conformity with the anatomy of the patient despite adjustments of the vertical height of the chin support 12, as indicated by arrow B. The vertical adjustability of the chin support 12 in this manner is accomplished by the provision of the cable stops 40 in combination with the slots 42 a and 42 b. In addition, the slots 30 a and 30 b on the main body 14 and the slots 33 a and 33 b on the adjustable body portions 16 a and 16 b, enable the described adjustments, while maintaining conformity with the anatomy of the patient.

The foregoing description of preferred embodiments for this disclosure has been presented for purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure to the precise form disclosed. Obvious modifications or variations are possible in light of the above teachings. The embodiments are chosen and described in an effort to provide the best illustrations of the principles of the disclosure and its practical application, and to thereby enable one of ordinary skill in the art to utilize the disclosure in various embodiments and with various modifications as are suited to the particular use contemplated. All such modifications and variations are within the scope of the disclosure as determined by the appended claims when interpreted in accordance with the breadth to which they are fairly, legally, and equitably entitled. 

The invention claimed is:
 1. A cervical collar having a vertically adjustable chin support, the collar comprising: a chin support adjustably connected to a collar body configured to be positioned adjacent a neck of a patient and defining an elongate slot, a cable having a proximal portion connected to a cable reel located on the collar body for selectively adjusting the length of the cable, and a cable tensioning system located on the collar body, the cable tensioning system including a cable stop connecting between the collar body and the chin support and slidingly positionable along the slot on the collar body and a pulley located on the collar body adjacent to the elongate slot, wherein a distal portion of the cable is connected to the cable stop and the cable is trained about the pulley so that the direction of the cable is changed between the cable stop and the and the cable reel, and adjustment of the length of the cable adjusts the position of the cable stop along the slot and adjusts the vertical position of the chin support relative to the collar body.
 2. The collar of claim 1, wherein the cable tensioning system further includes a bias member positioned operably associated with the cable stop to urge the cable stop in a direction away from the pulley.
 3. The collar of claim 2, wherein the bias member comprises a spring positioned to bear against the cable stop.
 4. The collar of claim 1, further comprising a main collar body fixedly connected to the cable stop and connected to the chin support.
 5. The collar of claim 1, wherein the pulley comprises a projection extending from the collar body.
 6. A cervical collar having a vertically adjustable chin support, the collar comprising: a rear collar portion and a front collar assembly, the front assembly including a chin support positionable at the front of a user with the chin of the user resting in the chin support, and the rear collar portion positionable at the back of the user, with the front collar assembly and the rear collar adjustably secured together to fit the neck of the user to restrain movement of the neck, the front assembly further comprising: a main collar body connected to the chin support and an adjustable collar body connected to the main collar body, the adjustable collar body including an elongate slot defined thereon, a cable having a proximal portion connected to a cable reel located on the adjustable collar body for selectively adjusting the length of the cable, and a cable tensioning system located on the adjustable collar body, the cable tensioning system including a cable stop extending into and slidingly positionable along the slot and connected to the main collar body, and a pulley located on the collar body adjacent to the elongate slot, wherein a distal portion of the cable is connected to the cable stop and the cable is trained about the pulley so that the direction of the cable is changed between the cable stop and the cable reel, and adjustment of the length of the cable adjusts the position of the cable stop along the slot and adjusts the vertical position of the chin support relative to the collar body.
 7. The collar of claim 6, wherein the cable tensioning system further includes a bias member positioned operably associated with the cable stop to urge the cable stop in a direction away from the pulley.
 8. The collar of claim 7, wherein the bias member comprises a spring positioned to bear against the cable stop.
 9. The collar of claim 7, wherein the bias member comprises a rubber band.
 10. A cervical collar having a vertically adjustable chin support, the collar comprising: a chin support having: a first side of the chin support adjustably connected to a first collar body configured to be positioned adjacent a first neck portion of a patient and defining a first elongate slot, a first cable having a proximal portion connected to a cable reel located on the collar body for selectively adjusting the length of the first cable, and a first cable tensioning system located on the first collar body, and a second side of the chin support adjustably connected to a second collar body configured to be positioned adjacent a second neck portion of a patient and defining a second elongate slot, a second cable having a proximal portion connected to the cable reel for selectively adjusting the length of the second cable, and a second cable tensioning system located on the second collar body, and the first and second cable tensioning systems each include a cable stop connecting between the collar body thereof and the chin support and slidingly positionable along the slot on the collar body thereof, a spring positioned to bear against the cable stop, and a pulley located adjacent to the elongate slot thereof, wherein a distal portion of the cable is connected to the cable stop and the cable is trained about the pulley so that the direction of the cable is changed between the cable stop and the and the cable reel, and adjustment of the length of the cable adjusts the position of the cable stop along the slot and adjusts the vertical position of the chin support relative to the collar body.
 11. The collar of claim 10, wherein the orientation of the chin support remains substantially constant in all vertical positions of the chin support.
 12. A cervical collar having a vertically adjustable chin support, the collar comprising: a chin support adjustably connected to a main collar body, and a pair of adjustable body portions pivotally connected to one another and configured to be positioned adjacent a neck of a patient and each defining an elongate vertical slot, a pair of cables each having a proximal portion connected to a cable reel located on one of the adjustable body portions for selectively adjusting the length of the cables, and a cable tensioning system located on each of the adjustable body portions, each cable tensioning system including a cable stop connecting between the adjustable body portion and the main collar body and slidingly positionable along the elongate vertical slot on the adjustable body portion and a pulley located on the adjustable body portion adjacent to the elongate slot, wherein a distal portion of the cable is connected to the cable stop and the cable is trained about the pulley so that the direction of the cable is changed between the cable stop and the and the cable reel, and adjustment of the length of the cable adjusts the position of the cable stop along the elongate vertical slot and adjusts the vertical position of the chin support relative to the collar body.
 13. The collar of claim 12, wherein the main body includes a pair of first adjustment slots and fasteners connecting each of the first adjustment slots to one of the adjustable body portions, and each of the adjustable body portions includes a second adjustment slot and fasteners connecting each of the second adjustment slots to the main body.
 14. A cervical collar having a vertically adjustable chin support, the collar comprising a chin support adjustably connected to a collar body having an elongate slot, a cable reel for adjusting the length of a cable trained around a pulley located on the collar body adjacent to the elongate slot and having a terminal end connected to a cable stop connecting between the collar body and the chin support and slidingly positionable along the elongate slot on the collar body, wherein the length of the cable adjusts the position of the cable stop along the elongate slot and adjusts the vertical position of the chin support relative to the collar body.
 15. An adjustable body support, comprising: a support adjustably connected to a body having an elongate slot, a cable reel for adjusting the length of a cable trained around a pulley located on the body adjacent to the elongate slot and having a terminal end connected to a cable stop connecting between the body and the support and slidingly positionable along the elongate slot on the body, wherein the length of the cable adjusts the position of the cable stop along the elongate slot and adjusts the position of the support relative to the body. 